Plank



FIG. 1 is a rear perspective view of a plank, showing my new design;

FIG. 2 is a left side view thereof, the right side view being a mirror image of the front view;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is a top view thereof, the bottom view being a mirror image of the top view.

The dot-dash-dot broken line(s) define the bounds of the claimed design and form no part thereof. 

CLAIM The ornamental design for a plank, as shown and described. 